Valve-releasing device



Feb. 13,1923. 1,445,001.

/ J. A. CAMPBELL VALVE RELEASING DEVICE Fnea oct. 14, 1921 Tirs- Lfu--52..

wfww,

61H50: way

thn. Campbell. j

l `nal combustion engines and is particularly Patented Feb. lg, 1923.

Meirieu star-*eis relier-ir eric E.

:roi-iN A. CAMPBELL, 4or WILMINGTON, DELAWARE.

Application fumi oetgber ifi, i921. s'eriai 3510-597393.

To all whom 'it' may concern Be it known that oHN A. CAMPBELL, a citizenor the United States, residing at Wilmington, in the county'of NewCastle and State of Delaware, has invented certain new and usefullniprovements rin Valve-Rcleasing Devices, of which the followingis aspecication. l

This invention relates more particularly to that .class of devicesprovided for the removal of valves and valve cages from interconstructedand arranged forthe' IIlOVal of these parts Jfromk engines ofthelover-'head val-ve type such as maybe found in the Buick automobile.

l cludes the vprovision of a yoke :member adapted to be arranged .overthe valve ,to be removed and an adjustable member carried by the saidyoke and constructed or engagement with the upper lend of the valve.

The ebjectV of the invention also includes lfor retaining the valve inposition during the application of the invention and after removal ofthe spring as will more clearly hereinafter appear and means forsecuring the upper end of the valvestem tov the lower end of the liftingmember.

Other 'features and advantages will more clearly appear by reference tothe accompanying drawing forminga part of this specification and whereinlike numerals of reference designate corresponding parts throughout theseveral views, in which Figure 1 is a side elevation showing theinvention in position and engaging the upper end of a valve.

Figure 2 is a similar view taken from the side.

Figure '5 is a top plan view.

Figure l is a perspective showing t--e construction of the centralengaging pine and Figure 5 is a similar view of the adjustine" screw.

olii detail the invention comprises the yoke member A which includes.the internally threaded tubular neck portion 1 and downwardly diverginglegs or supports 2 and 3. The supports 2 and 3 are oil'set at theirjunction with the neck 1 and gradually diverge the greater part of theirlength. The extremities l and 5 continue parallel for the purpose ofgiving strength to the structure and to provide a proper seating engagement with the engine wall B.

ltremities are parallel.

-More specifically the present inventioni'n-V Ainusual.'

Attention is directed to the tact that-the A supporting members 2 and 3are gradually cut away ytowards their center `as at 6 except thatportion comprising the parallel extreint ties and that the sidel wallsf4-7 of such ex- The .adjusting member@l is'formed of an Aevteriorlythreaded tube, the threads being yadapted for engagement [with theinterior threads of ythe neckfl; The.upper" end of' the adjustingmemberisf` formed withtliel integral nut"'8 iior'engagementvvithfa suitable'wrench.

l: Within the member and carried thereby is the valve engaging rod Dwhich includes the shank portion' 9 andthe y.enl; t' rg:i,.e d head 1Q.rllhe lower end of'theshankis formed with, the transverse slotv 11 theobject of which will be 'more clearly hereinafter set forth. y i

Attention, is `cliectel to the` ,Collar 12 hav-A ing set screw or thumbscrew 1,4. and SlfiOWny flnhliignre 1 in position. `on the valve stem"15. 1,11 Fles-fes' .land 2 also shavnthe wedge shaped" pin 16 passing,through the usual opening inthe upper end of the valve stem and thetransverse passage formed in the lower end of the rod 9. i

ln use the device is applied as Yfollows: The 'valve spring being firstremoved together withl the cage nut the collar-12 is placed over theupper end o1 the valve stem and locked by means of Vthe screw 14 so asto retain the yvalve in theupper position. After this operation theassembled device is placed over the cage opening and the valve steminserted in the lower end of the valve engaging member 9 in such a manltwill be seen that in order l justing member can be gradually elevatedand that in soy doing the member 9, because .of the enlarged 'head 10will also be elevated and will thereby withdraw the valve ca geo At thepresent time it is customary to `release the'valve and cage by firstgently Anecessary the parts are never in danger of damage.

It will be observed that due to the construction of the supportingmembers 2 and d access may be readily had to permit the ,locking andunlocking off the valve stein and ylifting member. v.In addition to theconvenience of the construction above outlined unusual strength isobtained.

VVarious changes `in details may be had. `without departing from thespirit of the invention.. f

' What I elaimkas new and desire tosecure by 'Letters Patent, is:- l

l. A devicev` of the class described comprising a yoke member having atubular interiorly threaded portion and a pair of oit-set supportsdiverging outwardly to a 'point near their extremities, a tubular membei' formed with threads engaging the threads of said neck and having a-`nut formed at its upper endyand a lifting mem ber arranged within saidtubular member and having removable means 'for engagement with anothermember.

2. A devicevof'the class described comprising a yoke `having a pair ofdownwardly diverging supporting members, the junction ot' the yoke andsupporting members beingoff-set and gradually decreasing in width for aportion of their length, an adjusting member carried by` said yoke, aremovable member carried by saidy adjusting member and'projecting belowthe latter, and means for locking said removable member to anothermember. y

A device of the class described coinpiisiig a yoke member having aninternally threaded neck portion and a pair of oft-setC'ownwardly'diverging supporting legs having reduced central portions, avalve stem formed with ra transverse passage, anadjusting memberyformedwith a wrench engaging upper end carried within said yoke neck,and ak valve engaging means within said adjusting member formed with anenlarged head adapted to seat on said wrench engagingend, the lower endoit'saidvalve` engaging member being formed with la transverse passageadapted for registration withthe` passage in said valve stein and awedge for locking said valve engaging meniber and valve stern together.

In testimony whereof I aiilx my signature.

JOHN A. CAMPBELL.

